Butt-welded tubular packaging body

Abstract

The present invention relates to a tubular packaging body formed from a flexible film having a thickness e, the ends of which are butt welded and covered by a plastic reinforcement element located on the inner surface of said tubular body and having a section defined by a width l and a height h, said tubular body being characterized in that all of the following conditions should be met: —h is greater than or equal to e, —the ratio (l·e)/h2 is between 1 and 10.

The invention claimed is: 
     
       1. A tubular packaging body formed from a flexible film having a thickness e, the ends of which are butt-welded and covered by a plastic reinforcing element, which does not include any metal, positioned on an inner surface of said tubular body and having a cross section defined by a width l and a height h, wherein:
 h is greater than or equal to e, 
 the ratio (l·e)/h 2  is between 1 and 10; and 
 l is greater than 0 and is less than or equal to 3 mm. 
 
     
     
       2. The tubular body as claimed in  claim 1 , wherein the height h is at most equal to two times the thickness e. 
     
     
       3. The tubular body as claimed in  claim 1 , wherein:
 h is between 100 μm and 500 μm, 
 e is between 100 μm and 400 μm. 
 
     
     
       4. The tubular body as claimed in  claim 2 , wherein the height h is equal to 1.2 times the thickness e. 
     
     
       5. The tubular body as claimed in  claim 1 , wherein l is between 1 mm and 3 mm. 
     
     
       6. The tubular body as claimed in  claim 1 , wherein said reinforcing element has a cross section of semioval shape. 
     
     
       7. The tubular body as claimed in  claim 1 , wherein said reinforcing element has a cross section of isosceles trapezoid shape. 
     
     
       8. The tubular body as claimed in  claim 1 , wherein said reinforcing element has a cross section of isosceles trapezoid shape, the two sides of which are concave. 
     
     
       9. The tubular body as claimed in  claim 1 , wherein said reinforcing element has a cross section of rectangular shape. 
     
     
       10. The tubular body as claimed in  claim 1 , wherein the ends of the film are beveled. 
     
     
       11. The tubular body as claimed in  claim 1 , wherein said film is a multilayer film and comprises at least one layer for which the butt welding is only partial or non-existent. 
     
     
       12. The tubular body as claimed in  claim 11 , wherein said layer forms an outer surface of the packaging. 
     
     
       13. The tubular body as claimed in  claim 1 , wherein said reinforcing element comprises several layers. 
     
     
       14. The tubular body as claimed in  claim 1 , wherein said reinforcing element comprises microscopic or nanoscopic markers in powder form that make it possible to combat counterfeiting. 
     
     
       15. The tubular body as claimed in  claim 1 , wherein the ratio of the flexural rigidity at the weld between the direction perpendicular to the weld and the direction parallel to the weld is at least equal to 25. 
     
     
       16. The tubular body as claimed in  claim 1 , wherein the plastic reinforcing element includes a barrier polymer. 
     
     
       17. The tubular body as claimed in  claim 1 , wherein the plastic reinforcing element includes an organic polymer that is an oxygen absorber.